radioactivity unit


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Noun1.radioactivity unit - a measure of radioactivity
electromagnetic unit, emu - any of various systems of units for measuring electricity and magnetism
millicurie - a unit of radioactivity equal to one thousandth of a curie
Ci, curie - a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second
Gy, gray - the SI unit of energy absorbed from ionizing radiation; equal to the absorption of one joule of radiation energy by one kilogram of matter; one gray equals 100 rad
R, roentgen - a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
rutherford - a unit strength of a radioactive source equal to one million disintegrations per second
REM - (Roentgen Equivalent Man) the dosage of ionizing radiation that will cause the same amount of injury to human tissue as 1 roentgen of X-rays
rad - a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material
References in periodicals archive ?
It found that the STS safe life with radioactivity unit could enhance students to express their ideas about nature of science.
The STS safe life with radioactivity unit could enhance students to express their ideas about nature of science in all aspects including tentativeness, empirical basis, subjectivity, creativity, socio-cultural embeddedness, observations and inference, and laws and theories.
Table 1: Learning activities of Yuenyong (2006) STS safe life with radioactivity unit contents lesson learning activities time Safe life with 1 1.